[isp-bgp] RE: Multiple Peerings on the same link

["Arie Vayner" <ariev@...>]

The most common use it in public peering points, where they have a L2
switch with many ISPs...

Arie 

-----Original Message-----
From: Tulip Rasputin [mailto:tulip_rasputin@...] 
Sent: Wednesday, September 08, 2004 9:29 AM
To: isp-bgp@isp-bgp.com
Subject: [isp-bgp] Multiple Peerings on the same link

Hi,

Any reason why somebody would want to have multiple BGP
peerings/sessions with the *same* router over the same link? I can
understand, if its multiple links (load balancing and redundancy), but
why over the same link?

One possible reason that comes to my mind is: if one of the peers wants
to implement some sort of policies, so he accepts one feed over one
session, applies its policies and accepts the same feed over the other
BGP session and applies a different set of policies. I know, all of this
can be done with a single BGP session too, but this is the best that
comes to my mind. 
Has anyone in this list ever seen such a case, wherein we have multiple
BGP sessions between the same peers over the same link!

Regards,
Tulip 





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